Night Light of Santiago (Cagayan Valley) from space (Philippines) Src. Average luminocity for 10x10km area is 15.5455% and for 50x50km: 1.0028%.
Square area 10x10 km:
 0%
 0%
 3.9%
 3.46%
 1.52%
 3.46%
 6.06%
 1.95%
 3.03%
 0%
 76.62%Square area 50x50 km:
 0%
 0%
 0.17%
 0.18%
 0.11%
 0.22%
 0.37%
 0.21%
 0.32%
 0.1%
 98.33%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
17° 21' 37.4" North, 120° 50' 44.1" East
16° 41' 17.1" North, 121° 32' 55.3" East
16° 0' 48.2" North, 122° 15' 6.6" East
Some cities around Santiago sort by population:
• Ramon
		10.8 km =6.7 mi, 
352°
• Alicia
		18.8 km =11.7 mi, 
57°
• Diadi
		20.7 km =12.9 mi, 
281°
• Echague
		13.7 km =8.5 mi, 
82°
• Saguday
		16.2 km =10.1 mi, 
174°
• Batal
		5.6 km =3.5 mi, 
90°
• Cabarroguis
		19.9 km =12.4 mi, 
188°
• Soyung
		12.5 km =7.8 mi, 
83°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016